C please explain also

Question

Write a program that will ask the user to continuously enter a number until such time that the
entered value is not a number.

#include <iostream>
#include <iomanip>
using namespace std;

int main(){
int number;
int sum = 0;
int product = 1;
int loopcount = 0;
int totalnum = 0;

std:: cout << "Enter total of numbers you want to add or multiply" <<endl;
std:: cin>> std::setw(1) >> totalnum;
std::cin.clear();

std:: cout<< "Enter"<<totalnum<< "numbers to add or multiply: " << endl;

while (loopcount < totalnum){
std::cout << "Input a number or 'x' to stop: " << endl;
std::cin>> std::setw(1)>> number;
std::cin.ignore();
std::cin.clear();

sum+= number;
product*= number;

loopcount= loopcount + 1;

if ( !( cin >> std::setw(1)>> number ) ) {break;}

std::cin.clear();
std::cin.ignore(INT_MAX, '\n');
}
std:: cout<<"The sum is :" <<sum<<endl;
std:: cout<<"The product is :" <<product<<endl;
return 0;
}
I have run this code it reads

Answer 1

std::cin.ignore(INT_MAX ,...) Here your int max is showing undefined becz of you missed header files in which this method belong

Just simply include this headerfile it will work fine
#include<climits>